Vehicular headlamp

Abstract

Provided is a vehicular headlamp including an excitation light source, a phosphor excited by the excitation light source, a projection lens, and a scanning mechanism configured to receive light generated by an excitation light source array on a reflective surface of a reflector and scan the light toward the phosphor. The excitation light source is formed as the excitation light source array having a plurality of light emitting portions. Between the excitation light source array and the scanning mechanism, a lens array having a plurality of light condensing portions is provided. The plurality of light condensing portions are arranged to respectively face the plurality of light emitting portions, and configured to condense lights emitted from respective light emitting portions on the reflective surface, respectively, and arrange respective optical images of reflected lights on the phosphor.

What is claimed is: 
     
       1. A vehicular headlamp comprising:
 an excitation light source; 
 a phosphor excited by the excitation light source; 
 a projection lens; and 
 a scanning mechanism configured to receive light generated by the excitation light source on a reflective surface of a reflector and scan the light toward the phosphor, 
 wherein the excitation light source is formed as an excitation light source array having a plurality of light emitting portions arranged linearly from a front to a rear direction, and 
 between the plurality of excitation light sources and the scanning mechanism, a lens array having a plurality of light condensing portions corresponding to each of the plurality of excitation light sources, the plurality of light condensing portions are arranged to face the plurality of light emitting portions, respectively, and are configured to narrow incident ranges of lights respectively emitted from the light emitting portions on the reflective surface of the reflector, angle the lights to be adjacent to each other in a vertical row on the reflective surface of the reflector, and arrange respective optical images of reflected lights on the phosphor. 
 
     
     
       2. The vehicular headlamp of  claim 1 , wherein the light condensing portions of the lens array are formed to have the same light condensing magnifications, respectively. 
     
     
       3. The vehicular headlamp of  claim 1 , wherein the light condensing portions of the lens array are formed to have different light condensing magnifications, respectively. 
     
     
       4. The vehicular headlamp of  claim 2 , wherein the plurality of light emitting portions are formed such that brightness is adjustable for each light emitting portion. 
     
     
       5. The vehicular headlamp of  claim 3 , wherein the plurality of light emitting portions are formed such that brightness is adjustable for each light emitting portion. 
     
     
       6. The vehicular headlamp of  claim 1 , wherein the incident ranges of the respective lights incident on the reflective surface of the reflector become larger from a front to a rear direction. 
     
     
       7. The vehicular headlamp of  claim 6 , wherein the plurality of light emitting portions are formed such that brightness is adjustable for each light emitting portion. 
     
     
       8. The vehicular headlamp of  claim 1 , wherein the incident ranges of the respective lights incident on the reflective surface of the reflector are uniform in shape. 
     
     
       9. The vehicular headlamp of  claim 8 , wherein the plurality of light emitting portions are formed such that brightness is adjustable for each light emitting portion.